[llvm] [BOLT] Use StringRef::consume_front (NFC) (PR #139432)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-bolt

Author: Kazu Hirata (kazutakahirata)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/139432.diff


1 Files Affected:

- (modified) bolt/lib/Profile/DataReader.cpp (+2-4) 


``````````diff
diff --git a/bolt/lib/Profile/DataReader.cpp b/bolt/lib/Profile/DataReader.cpp
index f2e999bbfdc6d..87b31667f5ff0 100644
--- a/bolt/lib/Profile/DataReader.cpp
+++ b/bolt/lib/Profile/DataReader.cpp
@@ -1028,9 +1028,8 @@ ErrorOr<SampleInfo> DataReader::parseSampleInfo() {
 }
 
 ErrorOr<bool> DataReader::maybeParseNoLBRFlag() {
-  if (ParsingBuf.size() < 6 || ParsingBuf.substr(0, 6) != "no_lbr")
+  if (!ParsingBuf.consume_front("no_lbr"))
     return false;
-  ParsingBuf = ParsingBuf.drop_front(6);
   Col += 6;
 
   if (ParsingBuf.size() > 0 && ParsingBuf[0] == ' ')
@@ -1051,9 +1050,8 @@ ErrorOr<bool> DataReader::maybeParseNoLBRFlag() {
 }
 
 ErrorOr<bool> DataReader::maybeParseBATFlag() {
-  if (ParsingBuf.size() < 16 || ParsingBuf.substr(0, 16) != "boltedcollection")
+  if (!ParsingBuf.consume_front("boltedcollection"))
     return false;
-  ParsingBuf = ParsingBuf.drop_front(16);
   Col += 16;
 
   if (!checkAndConsumeNewLine()) {

``````````

</details>


https://github.com/llvm/llvm-project/pull/139432